feat(impression): expose entity identity updates

Add core-owned APIs for renaming canonical subjects and adding aliases so updater logic can request identity changes without bypassing indexes.

Synchronize bound active entity subjects after renames and keep capability test stubs aligned.

Partner-Core/src/test/java/work/slhaf/partner/module/communication/CommunicationProducerTest.java

@@ -174,6 +174,16 @@ class CommunicationProducerTest {
             return false;
         }
 
+        @Override
+        public boolean renameEntitySubject(String entityUuid, String newSubject) {
+            return false;
+        }
+
+        @Override
+        public boolean addEntityAlias(String entityUuid, String alias, boolean deprecated) {
+            return false;
+        }
+
         @Override
         public boolean updateEntityImpression(String entityUuid, String impression, String newImpression, double confidence) {
             return false;

Partner-Core/src/test/java/work/slhaf/partner/module/memory/runtime/MemoryRuntimeTest.java

@@ -127,6 +127,16 @@ class MemoryRuntimeTest {
                 return false;
             }
 
+            @Override
+            public boolean renameEntitySubject(String entityUuid, String newSubject) {
+                return false;
+            }
+
+            @Override
+            public boolean addEntityAlias(String entityUuid, String alias, boolean deprecated) {
+                return false;
+            }
+
             @Override
             public boolean updateEntityImpression(String entityUuid, String impression, String newImpression, double confidence) {
                 return false;